Removing singular refractive indices with sculpted surfaces
2014 (English)In: Scientific Reports, ISSN 2045-2322, Vol. 4, 4876- p.Article in journal (Refereed) Published
The advent of Transformation Optics established the link between geometry and material properties, and has resulted in a degree of control over electromagnetic fields that was previously impossible. For waves confined to a surface it is known that there is a simpler, but related, geometrical equivalence between the surface shape and the refractive index, and here we demonstrate that conventional devices possessing a singularity-that is, the requirement of an infinite refractive index-can be realised for waves confined to an appropriately sculpted surface. In particular, we redesign three singular omnidirectional devices: the Eaton lens, the generalized Maxwell Fish-Eye, and the invisible sphere. Our designs perfectly reproduce the behaviour of these singular devices, and can be achieved with simple isotropic media of low refractive index contrast.
Place, publisher, year, edition, pages
2014. Vol. 4, 4876- p.
Transformation Optics, Waves, Transmutation
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-145804DOI: 10.1038/srep04876ISI: 000335216900004ScopusID: 2-s2.0-84899797352OAI: oai:DiVA.org:kth-145804DiVA: diva2:721544
QC 201406042014-06-042014-06-022014-06-04Bibliographically approved